Service difficulty report · Floorbeam · Boeing 757251

Difficulty date
October 8, 2024
Submitted
October 10, 2024
Operation
Air carrier
Aircraft
N550NW
Make and model
Boeing 757251
Aircraft serial
26497
Aircraft time
60,967 hours, 26,009 cycles
Part
Floorbeam
Condition
Corroded
Location
Zone 200
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

SHIP 5650 AREAS OF CORROSION ON TOP OF FWD MAIN CABIN FLOOR BEAM BS.377.7 BETWEEN BL.0 AND LBL.62.5. DOT 129-107. CORRECTIVE ACTION: REMOVED CORROSION AS REQUIRED AT MAIN CABIN FLOOR BEAM STA 377 BTWN BL 0 AND LBL 62.5, IAW B 757 SRM 51-10-02, EVALUATED AREA AT ON TOP OF FWD MAIN CABIN FLOOR BEAM BS.377.7 BETWEEN LBL 24 TO LBL.45, FOUND TO BE WITHIN LIMITS, RESTORED FINISH AS REQ IAW B 757 SRM 51-20-01. EVALUATED AREA AT ON TOP OF FWD MAIN CABIN FLOOR BEAM BS.377.7 BETWEEN BL.0 TO LBL.24, FOUND TO BE OUT OF LIMITS, IAW B757 SRM 53-00-51-1A PROCEDURE 1, FIG 101, DETAIL III, COMPLIED WITH ER/A 481634-14 MA REV B TYPICAL UPPER FLOOR BEAM CAP BLEND REPAIR. (0598645)